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Base64
Encoder & Decoder
Quickly encode text or data into Base64 format, or decode Base64 strings back to readable text. Secure, entirely client-side, and supports Unicode characters perfectly.
Privacy Guaranteed: This tool runs entirely in your browser. Your text and data are never sent to our servers.
Understanding Base64 Encoding
Base64 is a data encoding scheme that translates binary data (or plain text) into a readable, ASCII text format. It uses an alphabet of 64 characters (A-Z, a-z, 0-9, +, and /) to represent the data.
Is Base64 encryption?
No. Base64 is encoding, not encryption. It does not use a key, and anyone who intercepts a Base64 string can instantly decode it back to the original text. Never use Base64 to secure passwords or sensitive personal data.
Common Uses for Base64
- Data URLs: Embedding small images directly into HTML or CSS files to prevent an additional HTTP request (e.g.,
src="data:image/png;base64,..."). - Email Attachments: Email protocols (SMTP) are designed to handle text. Base64 is used to encode binary files like PDFs or JPGs so they can be transmitted safely over email.
- Data Transmission: Ensuring text containing special characters or binary data doesn't get corrupted during transit across networks or within XML/JSON payloads.
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Frequently Asked Questions
Does Base64 encoding increase file size?
Yes. Encoding binary data into Base64 typically increases the file size by roughly 33%. This is because it takes 4 characters (bytes) to represent every 3 bytes of binary data.
Is this tool safe to use with sensitive text?
Absolutely. This tool operates entirely inside your local browser using client-side JavaScript. Your text is never transmitted over the internet or saved to our databases.
Does this tool support emojis and Arabic text?
Yes! Our encoder uses a Unicode-safe encoding method to ensure that emojis, special symbols, and multi-byte languages like Arabic are converted flawlessly without data loss.
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